Inventory Changes Summary

You need to track inventory changes for a product over a series of days. Each input will consist of an integer n representing the number of days followed by n integers denoting daily changes in inventory (can be positive or negative). Given several pairs of days, compute the net inventory changes for these ranges. Your input will consist of the number of days, the changes and the number of queries, each containing two integers for the range. For example: Input: 5 10 -5 2 3 -1 2 0 2 1 4 Output: 7 -1 The first query calculates the inventory change from day 0 to day 2 (10 - 5 + 2) which equals 7, while the second calculates from day 1 to day 4 (-5 + 2 + 3 - 1) which equals -1.